Active Monitoring Antenna


This vertically polarised omni-directional antenna consists of an active antenna array, covering 20 to 6000 MHz. The antennas are combined under 1 compact radome and output in either a single (OMNI-A0098-03) or two connectors (OMNI-A0098-04). The active part of the antenna protects the system from excessive field strengths and boosts low level signals. The active version of this antenna relies on DC power injection on the output port of the antenna. The antenna is best utilised with the MISC-A0022-01 power supply for this purpose. The OMNI-A0098-03 features a passive-bypass mode which is engaged when the antenna is not powered. In this mode, the antenna is completely passive, allowing for low distortion measurements in the presence of high incident fields. The antenna, when paired with the OMNI-A0156 or OMNI-A0100 horizontally polarised omni-directional monitoring systems, provide full spectrum coverage for diverse SIGINT requirements

Additional information


OMNI-A0098-03 Active antenna with passive bypass and single N-type female connector
OMNI-A0098-04 Passive antenna with two N-type female connectors
Frequency range*: Band A: 20 - 1000 MHz Band
Frequency range*: B: 1000 - 6000 MHz
Gain See figures 1 & 2
Nominal H-plane 3 dB beamwidth 360°
Nominal E-plane 3 dB beamwidth 60°
Azimuth ripple (RMS) Band A: ±1.5 dB
Azimuth ripple (RMS) Band B: ±2.5 dB
VSWR (typ.) < 2:1
Polarisation Linear
RF power rating Receive only
Connector type N-type female
Input voltage (via coaxial cable.) 13 - 24 VDC
Input current < 150 mA

    Product Applications

    Spectrum Management
  • Spectrum Monitoring
  • Radio Direction Finding
  • Signals Intelligence

    Design Features

  • Ultra wideband 20 to 6000 MHz Protected against excessive field strengths Very good sensitivity Low profile compared to passive alternatives Robust IP63 General spectrum monitoring Suitable for vehicle-mount and mast-mount applications Internal limiter allow operation in adverse EMC environments MISC-A0022-01 power supply OMNI-A0107 compact VP active monitoring antenna OMNI-A0156 HP active monitoring antenna